Round Head LED — 3mm & 5mm (Red / Green / Yellow / Mix) - RS041

Description:

High-clarity round-head indicator LEDs — choose 3mm or 5mm diameter in Red, Green, Yellow or mixed-color packs. These standard through-hole LEDs are manufactured to industry specs and commonly used for panel indicators, status lights, DIY electronics, Arduino/ESP projects and educational kits.

Specifications:

• Package: Round through-hole, 3mm (T-1) or 5mm (T-1¾).
• Nominal forward current (IF): 20 mA (standard test/current rating; some low-current variants rated lower).
• Absolute max forward current: typically 30–50 mA for general LEDs (pulse ratings higher).
• Forward voltage (VF) typical:
  • Red: ~1.8–2.2 V.
  • Yellow: ~2.0–2.4 V.
  • Green: ~2.0–3.0 V (depends on GaP/AlInGaP vs GaN tech); many green AlInGaP LEDs ~2.0–2.4 V.
• Peak wavelength (λp) (typical):
  • Red: ~612–630 nm.
  • Yellow: ~580–595 nm.
  • Green: ~562–575 nm (depending on LED chemistry).
• Luminous intensity: manufacturer-specified groups (mcd) — ranges from a few mcd to several thousand mcd depending on “standard” vs “high-intensity” variants. Example: 5 mm high-intensity types can list 1000–5000 mcd.
• Viewing angle: typical options from ~18° (narrow) up to 60° (diffused) depending on lens type.
• Reverse voltage (VR): typically around 4–5 V
• Operating temperature: typically −40°C to +85°C or manufacturer-specified range.

Why choose these LEDs 

• Standard T-1 (3mm) and T-1¾ (5mm) packages for compatibility with breadboards and PCB mount holes.
• Typical forward current 20 mA (operate at ≤20 mA for long life; many low-current variants exist). 
• Typical forward voltage varies by color (see technical specs below).

Applications:

• Panel indicators, status LEDs, hobbyist and educational electronics, prototyping, indicator lamps for appliances, and LED arrays.

Features:

• Available in 3mm (T-1) and 5mm (T-1¾) round packages.
• Colors: Red, Green, Yellow, or Mixed packs (choose per-LED color or mixed set).
• Typical forward current: 20 mA (many data sheets specify 20 mA as standard test current).
• Typical forward voltage: ~1.8–2.4 V depending on color (see specs).
• Viewing angle: varies by model — common ranges: ~20° (narrow), 25°–30° (standard narrow), up to 60° (diffused).
• Long lifetime and stable color over usual operating conditions.

Package Included:

• 10 × Round Head LEDs (Choose color: Red / Green / Yellow) — in selected size (3mm or 5mm)